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https://www.readbyqxmd.com/read/28544923/unfavorable-prognostic-role-of-tumor-infiltrating-lymphocytes-in-hormone-receptor-positive-her2-negative-metastatic-breast-cancer-treated-with-metronomic-chemotherapy
#1
Emilia Montagna, Andrea Vingiani, Patrick Maisonneuve, Giuseppe Cancello, Federica Contaldo, Giancarlo Pruneri, Marco Colleoni
BACKGROUND: High levels of tumor-infiltrating lymphocytes (TILs) in primary triple negative and HER2-positive breast cancer (BC) have been associated with an improved patients' outcome. The role of TILs in Luminal (hormone receptor positive and HER2 negative) tumors remains to be elucidated. Moreover, the association between TILs and prognosis in the metastatic setting is still unknown. PATIENTS AND METHODS: We evaluated the relationship between TILs and time to progression (TTP) in metastatic BC patients enrolled in a prospective phase II trial of metronomic chemotherapy, that used cyclophosphamide 50 mg daily, capecitabine 500 mg thrice daily and vinorelbine 40 mg orally three times a week (VEX combination)...
May 22, 2017: Breast: Official Journal of the European Society of Mastology
https://www.readbyqxmd.com/read/28544798/quantitative-phase-imaging-for-label-free-cytometry
#2
EDITORIAL
Elena Holden, Attila Tárnok, Gabriel Popescu
No abstract text is available yet for this article.
May 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/28544614/proteomic-profiling-of-the-hypothalamus-in-two-mouse-models-of-narcolepsy
#3
Sausan Azzam, Daniela Schlatzer, David Nethery, Dania Saleh, Xiaolin Li, Afaf Akladious, Mark R Chance, Kingman P Strohl
Narcolepsy is a disabling neurological disorder of sleepiness linked to the loss of neurons producing orexin neuropeptides in the hypothalamus. Two well characterized phenotypic mouse models of narcolepsy, loss-of-function (orexin-knockout) and progressive loss of orexin (orexin/ataxin-3) exist. The open question is whether the proteomics signatures of the hypothalamus would be different between the two models. To address this gap, we utilized a label-free proteomics approach and conducted a hypothalamic proteome analysis by comparing each disease model to that of wild type...
May 22, 2017: Proteomics
https://www.readbyqxmd.com/read/28544427/advanced-consumable-free-morphological-analysis-of-intact-red-blood-cells-by-a-compact-scanning-flow-cytometer
#4
K V Gilev, E S Yastrebova, D I Strokotov, M A Yurkin, N A Karmadonova, A V Chernyshev, V V Lomivorotov, V P Maltsev
Whereas modern automated blood cell analyzers measure the volume of individual red blood cells (RBCs), leading to four RBC indices (mean corpuscular volume, MCV; mean corpuscular hemoglobin, MCH; mean corpuscular hemoglobin concentration, MCHC; red cell distribution width, and RDW), the RBC shape has not been assessed by clinical screening tools. We applied the scanning flow cytometer (SFC) for complete characterization of intact RBC morphology in terms of diameter, maximal and minimal thicknesses, volume, surface area, sphericity index, spontaneous curvature, hemoglobin concentration, and content...
May 19, 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/28544415/inertial-microfluidic-cell-stretcher-imcs-fully-automated-high-throughput-and-near-real-time-cell-mechanotyping
#5
Yanxiang Deng, Steven P Davis, Fan Yang, Kevin S Paulsen, Maneesh Kumar, Rebecca Sinnott DeVaux, Xianhui Wang, Douglas S Conklin, Assad Oberai, Jason I Herschkowitz, Aram J Chung
Mechanical biomarkers associated with cytoskeletal structures have been reported as powerful label-free cell state identifiers. In order to measure cell mechanical properties, traditional biophysical (e.g., atomic force microscopy, micropipette aspiration, optical stretchers) and microfluidic approaches were mainly employed; however, they critically suffer from low-throughput, low-sensitivity, and/or time-consuming and labor-intensive processes, not allowing techniques to be practically used for cell biology research applications...
May 23, 2017: Small
https://www.readbyqxmd.com/read/28542806/structural-and-functional-study-of-a-simple-rapid-and-label-free-dnazyme-based-dna-biosensor-for-optimization-activity
#6
Narges Shahbazi, Saman Hosseinkhani, Khosro Khajeh, Bijan Ranjbar
Peroxidase-mimicking DNAzyme has a potential to self-assemble into a G-quadruplex and shows peroxidase activity. In comparison to proteins, peroxidase-mimicking DNAzyme is less expensive and more stable. Herein, it is used in fabricating non-labeling biosensors. This paper investigates the structural and functional properties of a DNA biosensor based on split DNAzyme with a detection limit in nM range (9.48 nM). Two halves of DNAzyme were linked by a complementary sequence of DNA target. Hybridization of the DNA target pulled two DNAzyme halves apart and peroxidase activity decreased...
May 20, 2017: Biopolymers
https://www.readbyqxmd.com/read/28542244/a-quantitative-label-free-analysis-of-the-extracellular-proteome-of-human-supraspinatus-tendon-reveals-damage-to-the-pericellular-and-elastic-fibre-niches-in-torn-and-aged-tissue
#7
Osnat Hakimi, Nicola Ternette, Richard Murphy, Benedikt M Kessler, Andrew Carr
Tears of the human supraspinatus tendon are common and often cause painful and debilitating loss of function. Progressive failure of the tendon leading to structural abnormality and tearing is accompanied by numerous cellular and extra-cellular matrix (ECM) changes in the tendon tissue. This proteomics study aimed to compare torn and aged rotator cuff tissue to young and healthy tissue, and provide the first ECM inventory of human supraspinatus tendon generated using label-free quantitative LC-MS/MS. Employing two digestion protocols (trypsin and elastase), we analysed grain-sized tendon supraspinatus biopsies from older patients with torn tendons and from healthy, young controls...
2017: PloS One
https://www.readbyqxmd.com/read/28541894/the-extreme-value-machine
#8
Ethan M Rudd, Lalit P Jain, Walter J Scheirer, Terrance E Boult
It is often desirable to be able to recognize when inputs to a recognition function learned in a supervised manner correspond to classes unseen at training time. With this ability, new class labels could be assigned to these inputs by a human operator, allowing them to be incorporated into the recognition function - ideally under an efficient incremental update mechanism. While good algorithms that assume inputs from a fixed set of classes exist, e.g., artificial neural networks and kernel machines, it is not immediately obvious how to extend them to perform incremental learning in the presence of unknown query classes...
May 23, 2017: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28541718/colorectal-cancer-cells-adhere-to-traumatized-peritoneal-tissue-in-clusters-an-experimental-study
#9
Peter Falk, Andreas Jonsson, Torbjörn Swartling, Marie-Lois Ivarsson
Purpose/Aim: Colorectal malignity is one of the most common forms of cancer. The finding of free intraperitoneal colorectal cancer cells during surgery has been shown to be associated with poor outcome. The aim of this study was to develop an experimental model designed to investigate adhesion of colorectal cancer cells to the peritoneal surface. MATERIALS AND METHODS: Two human experimental models were developed, the first using cultured mesothelial cells and the second consisting of an ex vivo model of peritoneal tissue...
May 25, 2017: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/28541039/label-free-discrimination-of-rhizobial-bacteroids-and-mutants-by-single-cell-raman-microspectroscopy
#10
Jiabao Xu, Isabel Webb, Philip Poole, Wei E Huang
Symbiotic rhizobia in legume account for a large portion of nitrogen fixation in the biosphere. Nitrogen fixation is an energy-demanding process requiring tight control of metabolism and redox state. It is of great interest to understand the bacteroid differentiation process and the roles of energy storage molecules, such as glycogen and polyhydroxybutyrate (PHB), in maintaining the Rhizobium-legume symbioses. Traditional biochemical assays for checking phenotypic changes of mutants require a large volume of starting materials, which is difficult for unculturable, terminally differentiated bacteroids...
May 25, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28541036/non-invasive-diagnosis-of-high-grade-urothelial-carcinoma-in-urine-by-raman-spectral-imaging
#11
Hesham K Yosef, Sascha D Krauß, Tatjana Lechtonen, Hendrik Jütte, Andrea Tannapfel, Heiko Udo Käfferlein, Thomas Brüning, Florian Roghmann, Joachim Noldus, Axel Mosig, Samir F El-Mashtoly, Klaus Gerwert
The current gold standard for diagnosis of bladder cancer is cystoscopy, which is an invasive and painful for patients. Therefore, the non-invasive urine cytology is usually used in clinics as an adjunct to cystoscopy. However, it suffers from low sensitivity. Here, a novel non-invasive, label-free approach on urine is presented with high sensitivity. CARS imaging of urine sediments was used in the first step for fast preselection of urothelial cells, where, the high-grade urothelial cancer cells are characterized by a large nucleus to cytoplasm ratio...
May 25, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28541032/exosome-classification-by-pattern-analysis-of-surface-enhanced-raman-spectroscopy-data-for-lung-cancer-diagnosis
#12
Jaena Park, Miyeon Hwang, ByeongHyeon Choi, Hyesun Jeong, Jik-Han Jung, Hyun Koo Kim, Sunghoi Hong, Ji Ho Park, Yeonho Choi
Owing to the role of exosome as a cargo for intercellular communication, especially in cancer metastasis, the evidence has been consistently accumulated that exosomes can be used as a non-invasive indicator of cancer. Consequently, several studies applying exosome have been proposed for cancer diagnostic methods such as ELISA assay. However, it has been still challenging to get reliable results due to the requirement of a labeling process and high concentration of exosome. Here, we demonstrate a label-free and highly sensitive classification method of exosome by combining surface enhanced Raman scattering (SERS) and statistical pattern analysis...
May 25, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28540969/a-dual-signal-sensing-system-based-on-organic-dyes-ldhs-film-for-fluorescence-detection-of-cysteine
#13
Mingzhe Li, Yanyan Fu, Lan Jin
It is of great significance to sense cysteine (Cys) in a simple and fast way because of its potential applications in biological processes. In this contribution, we proposed a Cu(2+)-mediated fluorescence switchable strategy to detect Cys by designing a dual-signal fluorescence-enhanced sensor. Two organic dyes immobilized onto layered double hydroxides (LDHs) as novel sensors have been fabricated. It was found that the two fluorescence emissions of the obtained ultrathin films (donated as calcein@NFR/LDHs UTFs) could be effectively quenched by Cu(2+) (off state), then reversibly recovered by Cys (on state) owing to the specific coordination of Cys and Cu(2+)...
May 25, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28540652/development-of-low-cost-instrumentation-for-single-point-autofluorescence-lifetime-measurements
#14
João Lagarto, Jonathan D Hares, Christopher Dunsby, Paul M W French
Autofluorescence lifetime measurements, which can provide label-free readouts in biological tissues, contrasting e.g. different types and states of tissue matrix components and different cellular metabolites, may have significant clinical potential for diagnosis and to provide surgical guidance. However, the cost of the instrumentation typically used currently presents a barrier to wider implementation. We describe a low-cost single point time-resolved autofluorescence instrument, exploiting modulated laser diodes for excitation and FPGA-based circuitry for detection, together with a custom constant fraction discriminator...
May 25, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/28540420/allred-score-is-a-promising-predictor-of-prognosis-and-medroxyprogesterone-acetate-efficacy-in-patients-with-endometrial-cancer
#15
Mayu Yunokawa, Hiroshi Yoshida, Reiko Watanabe, Emi Noguchi, Akihiko Shimomura, Tatsunori Shimoi, Kan Yonemori, Chikako Shimizu, Yasuhiro Fujiwara, Kenji Tamura
PURPOSE: Predictors of response or disease control with oral medroxyprogesterone acetate (MPA) therapy in patients with metastatic or recurrence endometrial cancer remain to be elucidated. The purpose of this study was to clarify the effect of MPA in patients with endometrial cancer and identify markers that predict MPA efficacy. METHODS: We retrospectively analyzed clinical and pathological factors in patients who received MPA. Expression of estrogen receptor, progesterone receptor (PgR), androgen receptor, and Ki67 index was assessed with residual tissue samples of endometrial cancer...
May 24, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28539618/effect-of-exenatide-after-short-time-intensive-insulin-therapy-on-glycaemic-remission-maintenance-in-type-2-diabetes-patients-a-randomized-controlled-trial
#16
Xiulin Shi, Yalin Shi, Ning Chen, Mingzhu Lin, Weijuan Su, Huijie Zhang, Changqin Liu, Haiqu Song, Fangsen Xiao, Peiying Huang, Liying Wang, Wei Liu, Jinyang Zeng, Bing Yan, Qi Liu, Suhuan Liu, Shuyu Yang, Xiaoying Li, Zhibin Li, Xuejun Li
Early short-term intensive insulin (STII) therapy can induce drug-free glycemic remission for up to 1 year in half of newly diagnosed type 2 diabetic mellitus (T2DM) patients. Whether exenatide following STII therapy will induce higher long-term glycaemic remission is currently unknown. To assess the effect of STII+ exenatide therapy, compared with STII only, on maintenance of glycaemic remission in newly diagnosed T2DM patients. In this randomized, parallel-group, open-label, controlled trial, 129 patients (66 in STII+ exenatide group and 63 in STII only group) firstly completed 3-week STII therapy, then STII+ exenatide group was treated with exenatide for 12 weeks further...
May 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28538653/development-of-diamond-and-silicon-mems-sensor-arrays-with-integrated-readout-for-vapor-detection
#17
Maira Possas-Abreu, Farbod Ghassemi, Lionel Rousseau, Emmanuel Scorsone, Emilie Descours, Gaelle Lissorgues
This paper reports on the development of an autonomous instrument based on an array of eight resonant microcantilevers for vapor detection. The fabricated sensors are label-free devices, allowing chemical and biological functionalization. In this work, sensors based on an array of silicon and synthetic diamond microcantilevers are sensitized with polymeric films for the detection of analytes. The main advantage of the proposed system is that sensors can be easily changed for another application or for cleaning since the developed gas cell presents removable electrical connections...
May 24, 2017: Sensors
https://www.readbyqxmd.com/read/28537071/clmsvault-a-software-suite-for-protein-cross-linking-mass-spectrometry-data-analysis-and-visualization
#18
Mathieu Courcelles, Jasmin Coulombe-Huntington, Émilie Cossette, Anne-Claude Gingras, Pierre Thibault, Michael Tyers
Protein cross-linking mass spectrometry (CL-MS) enables the sensitive detection of protein interactions and the inference of protein complex topology. The detection of chemical cross-links between protein residues can identify intra- and inter-protein contact sites and/or provide physical constraints for molecular modeling of protein structure. Recent innovations in cross-linker design, sample preparation, mass spectrometry and software tools have significantly improved CL-MS approaches. Although a number of algorithms now exist for the identification of cross-linked peptides from mass spectral data, a dearth of user-friendly analysis tools represent a practical bottleneck to the broad adoption of the approach...
May 24, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28536826/a-phase-ii-study-of-5-fluorouracil-l-leucovorin-oxaliplatin-mfolfox6-in-japanese-patients-with-metastatic-or-unresectable-small-bowel-adenocarcinoma
#19
Takahiro Horimatsu, Norisuke Nakayama, Toshikazu Moriwaki, Yoshinori Hirashima, Mikio Fujita, Masako Asayama, Ichiro Moriyama, Koji Nakashima, Eishi Baba, Hiroshi Kitamura, Takao Tamura, Ayumu Hosokawa, Kenichi Yoshimura, Manabu Muto
BACKGROUND: Several studies have suggested that chemotherapy prolonged survival in patients with metastatic or recurrent small bowel adenocarcinoma (SBA); however, there is still no standard chemotherapy regimen. Here, we evaluated the efficacy and safety of a 5-fluorouracil (5-FU)/L-leucovorin (l-LV)/oxaliplatin (mFOLFOX6) protocol as a first-line therapy for patients with SBA. PATIENTS AND METHODS: This was a multicenter, single-arm, open-label phase II study...
May 23, 2017: International Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28536710/a-label-free-ratiometric-electrochemical-dna-sensor-for-monitoring-intracellular-redox-homeostasis
#20
Xinping Liu, Zhengqing Yan, Yuhuan Sun, Jinsong Ren, Xiaogang Qu
A label-free ratiometric electrochemical biosensor was constructed for monitoring intracellular redox homeostasis by DNA metallization-mediated hybridization chain reaction amplification. This platform could also be used to discriminate cancer cells and normal cells.
May 24, 2017: Chemical Communications: Chem Comm
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